CN201210132Y - Laser back scattering dust measurement instrument - Google Patents

Laser back scattering dust measurement instrument Download PDF

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Publication number
CN201210132Y
CN201210132Y CNU2008200774784U CN200820077478U CN201210132Y CN 201210132 Y CN201210132 Y CN 201210132Y CN U2008200774784 U CNU2008200774784 U CN U2008200774784U CN 200820077478 U CN200820077478 U CN 200820077478U CN 201210132 Y CN201210132 Y CN 201210132Y
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CN
China
Prior art keywords
laser
box
light
back scattering
mainframe box
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CNU2008200774784U
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Chinese (zh)
Inventor
白惠峰
徐宗照
闫兴钰
白惠宾
王红梅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sinogreen Environmental Protection Science & Technology Co., Ltd.
Original Assignee
TAIYUAN ZHONGLV ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
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Priority to CNU2008200774784U priority Critical patent/CN201210132Y/en
Application granted granted Critical
Publication of CN201210132Y publication Critical patent/CN201210132Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a laser backscattering dust gauge, belonging to the technical field of the equipment using laser backscattering to measure the concentration of gaseous emission, which solves the problem of providing a laser backscattering dust gauge. The gauge continuously and accurately measures the concentration of soot particles in the flue gas on line by means of the laser backscattering measurement principle and adopts the proposal that: a probe device has the structure that the upper part of the left wall of a box-typed mainframe box is provided with a laser; the upper part of the right wall of the box-typed mainframe box is provided with protection glass that is non-parallel longitudinally; the middle of the right wall of the box-typed mainframe box is provided with a receiving lens mount which is inwardly sheathed with a receiving lens; photosensitive cells are arranged on the position of the left wall of the box-typed mainframe box and are coaxial with the receiving lens mount, and light blocking devices are arranged among the photosensitive cells, the protection glass and the receiving glass. The dust gangue can be widely applied to various fields of gas emission concentration measurement.

Description

The laser back scattering dust-measuring instrument
Technical field
The utility model laser back scattering dust-measuring instrument, be specifically related to a kind of laser back scattering measuring principle of utilizing, soot dust granule substrate concentration in the flue gas of Industrial Boiler, boiler of power plant, Industrial Stoves is carried out the on-line continuous measuring equipment, belong to the equipment technical field of laser back scattering measurement gas emissions concentration.
Background technology
Soot dust granule substrate concentration in the flue gas of industrial pollution source emission is carried out the on-the-spot on-line continuous most optics opacity method that adopts of monitoring automatically both at home and abroad now, its principle is that a branch of light is injected flue, because the absorption and the scattering of particle, the light intensity decay, its light intensity weakened after light beam passed flue dust, when combustion medium is stablized, flue length is fixed, weakening of its light intensity is relevant with flue endoparticle substrate concentration, thereby can determine the soot dust granule substrate concentration by the variation of light intensity before and after the flue.
It is convenient to measure the soot dust granule substrate concentration with the opaque method of optics, but certain restriction is arranged, when the concentration of soot dust granule thing is too high or too low, the sensitivity of measuring is not high, and is high to measuring the requirement of light path collimation, otherwise error is very big, it is time-consuming that complexity is installed, and is subjected to vibration effect very big.Along with promoting the use of of high-effective dust-removing device, the demand that detects the low concentration flue dust progressively increases, for detecting the efficiency of dust collection of fly-ash separator, the user that concentration detection apparatus is installed before and after the fly-ash separator is also progressively increasing, be high concentration like this before the dedusting, be low concentration after the dedusting, use optics opacity method to measure in some occasions and just be restricted.Therefore people have developed and have adopted the scattered light principle to detect the device of soot dust granule substrate concentration.The advantage of this class pick-up unit is that the length of testing result and light path is irrelevant, can not only be real-time, online, continuous measurement, and also easy for installation.Principle is that a branch of light is injected flue, light beam and soot dust granule thing interact and produce scattering, the power of scattered light is directly proportional with total scatter cross-section, when the soot dust granule substrate concentration raises, the total scatter cross-section of soot dust granule thing increases, scattered light strengthens, and can obtain the concentration of soot dust granule thing by the power of measuring scattered light, and experiment test: resolution can reach 0.02mg/m 3, minimum measurement range 0-2mg/m 3But existing scattered light particle concentration pick-up unit, volume is bigger on the one hand, be unfavorable for on-the-spot the installation, on the one hand LASER Light Source be subjected at the scene environment temperature and controlled current flow non-constant influence also bigger, cause signal drift, simultaneously calibrating installation is complicated and can not reach Continuous Tracking to the compensation correction of signal, and is bad to the correlativity of particle concentration.
The utility model content
The utility model overcomes the deficiency that prior art exists, problem to be solved provides a kind of laser back scattering dust-measuring instrument, this device utilizes laser back scattering measuring principle, the equipment that soot dust granule substrate concentration in the flue gas is carried out on-line continuous, measures exactly.
In order to address the above problem, the scheme that the utility model adopts is: the laser back scattering dust-measuring instrument, comprise that mainly probe apparatus and metering circuit constitute, described metering circuit structure is: pre-service and power controller connect the laser instrument of probe apparatus and the light-sensitive cell of described probe apparatus by lead, the output terminal of pre-service and power controller links to each other with signal modulation circuit, and signal modulation circuit links to each other with terminal process equipment with signal amplification circuit, signal demodulating circuit, V/I change-over circuit successively by lead; The structure of described probe apparatus is: the top at box mainframe box left side wall is provided with laser instrument; be provided with and the cover glass that vertically keeps non-parallel state on the top of box main frame right wall of box; middle part at the right wall of box mainframe box is provided with the reception lens mount; in receiving lens mount to being set with the reception camera lens; on the left wall of box mainframe box; and the position coaxial with receiving lens mount is provided with light-sensitive cell, is provided with light-baffling device between light-sensitive cell and cover glass, the reception camera lens.
Above-mentioned reception camera lens uses spacer ring and trim ring sealing and fixing in receiving lens mount, and the right side that receives camera lens is provided with big protective glass.
The structure of above-mentioned laser instrument is: the laser cover is fixed on the top of box mainframe box left side wall together by enclosing cover, and semiconductor laser tube is installed in the right side of laser cover, and the laser cover is provided with the laser goggle to the right.
The structure of above-mentioned light-baffling device is: the bottom that is positioned at probe apparatus is fixed with motor cabinet, be fixed with motor on the motor cabinet, be fixed with light barrier on the axle sleeve of motor, described light barrier is provided with reference to unthreaded hole and signal unthreaded hole, described with reference to unthreaded hole, signal unthreaded hole and axle sleeve three not on the line of the same side.
Above-mentioned light barrier be shaped as circle or for square or for fan-shaped or for triangle or for trapezoidal.
The utility model makes full use of luminous energy, and light intensity is even; Laser control circuit adaptability is strong, and range of current is big, and is adjustable continuously, and temperature control effect is good; Light-baffling device can be finished the compensation that luminous flux of light source is changed the measured deviation of bringing, compact conformation, and principle is reliable; Increase blowing function simultaneously the instrument minute surface is carried out periodic maintenance; Detectable soot dust granule scope is big, reacts the concentration value in the flue more exactly.
Description of drawings
Below in conjunction with accompanying drawing the utility model laser back scattering dust-measuring instrument is described further:
Fig. 1 is the structural representation of the utility model laser back scattering dust-measuring instrument;
Fig. 2 is a theory structure synoptic diagram shown in Figure 1;
Fig. 3 is an independent principle schematic by flashlight shown in Figure 1;
Fig. 4 is an independent principle schematic by reference light shown in Figure 1.
Wherein: 1-pedestal; 2-cover glass; 3-reception lens mount; 4-reception camera lens; 5-spacer ring; 6-trim ring; 7-axle sleeve; 8-light barrier; 9-motor cabinet; 10-motor; 11-base; 12-protective glass; 13-light-sensitive cell; 14-collar; 15-laser cover; 16-enclosing cover; 17-laser tube; 18-laser goggle; 19-mainframe box; 20-laser instrument; 21-light-baffling device; 22-with reference to unthreaded hole; 23-signal unthreaded hole; 24-pre-service and power controller; 25-signal modulation circuit; 26-signal amplification circuit; 27-signal demodulating circuit; 28-V/I change-over circuit; 29-terminal process equipment; 30-big protective glass
Embodiment
The utility model laser back scattering dust-measuring instrument as depicted in figs. 1 and 2, the laser back scattering dust-measuring instrument, comprise that mainly probe apparatus and metering circuit constitute, described metering circuit structure is: pre-service and power controller 24 connect the laser instrument 20 of probe apparatus and the light-sensitive cell 13 of described probe apparatus by lead, the output terminal of pre-service and power controller 24 links to each other with signal modulation circuit 25, and signal modulation circuit 25 links to each other with signal amplification circuit 26, signal demodulating circuit 27, V/I change-over circuit 28 and terminal process equipment 29 successively by lead; The structure of described probe apparatus is: the top at box mainframe box 19 left walls is provided with laser instrument 20; be provided with and the cover glass 2 that vertically keeps non-parallel state on the top of box mainframe box 19 right walls; be provided with at the middle part of the right wall of box mainframe box 19 and receive lens mount 3; in receiving lens mount 3, receive camera lens 4 to being set with; on the left wall of box mainframe box 19; and the position coaxial with receiving lens mount 3 is provided with light-sensitive cell 13, is provided with light-baffling device 21 between light-sensitive cell 13 and cover glass 2, the reception camera lens 4.
Described mainframe box 19 is the rectangular parallelepiped casing; the top of the right wall of mainframe box 19 is provided with pedestal 1; be provided with in the pedestal 1 and the cover glass 2 that vertically is held in 15 °; be provided with in the centre of the right wall of box mainframe box 19 and receive lens mount 3; in receiving lens mount 3, inwardly be set with and receive camera lens 4; on the left wall of mainframe box 19; and the position coaxial with receiving lens mount 3 is provided with light-sensitive cell 13; cover glass 2 on described right side; be provided with light-baffling device 21 between the light-sensitive cell 13 in reception camera lens 4 and left side; the bottom that described light-baffling device 21 is positioned at probe apparatus is fixed with motor cabinet 9; be fixed with motor 10 on the motor cabinet 9; be fixed with light barrier 8 on the axle sleeve 7 of motor 10; being shaped as of described light barrier 8 is fan-shaped; or be square; or be circular; or be triangle; or be trapezoidal; described reception camera lens 4 usefulness spacer rings 5 and trim ring 6 sealing and fixing are in receiving lens mount 3, and the right side that receives camera lens 4 is provided with big protective glass 30.
Described reception camera lens 4 usefulness spacer rings 5 and trim ring 6 sealing and fixing are in objective holder 3; Being shaped as of described light barrier 8 be fan-shaped, can also be for square or for circular or for triangle or for trapezoidal; The right side of described light-sensitive cell 13 is provided with protective glass 12, and light-sensitive cell 13 and protective glass 12 are fixed in the base 11 together, and base 11 is fixed in the collar 14, and the collar 14 is fixed on the left wall of mainframe box 19, and with receiving lens mount 3 levels on the coaxial position; The structure of described laser instrument 20 is: laser cover 15 is fixed on the top of box mainframe box 19 left walls together by enclosing cover 16, the laser tube 17 that semiconductor material is made is installed in the right side of laser cover 15, laser cover 15 is provided with laser goggle 18 to the right, and laser tube 17 links to each other with laser generator by optical fiber; The bottom that described light-baffling device 21 is positioned at probe apparatus is fixed with motor cabinet 9, is fixed with motor 10 on the motor cabinet 9, is fixed with light barrier 8 on the axle sleeve 7 of motor 10.
Fig. 3 is an independent principle schematic by flashlight shown in Figure 1; motor 10 among the figure in the light-baffling device 21 is rotated counterclockwise extreme lower position; the light barrier 8 that fixes with motor 10 also rotates to extreme lower position; described light barrier 8 is provided with reference to unthreaded hole 22 and signal unthreaded hole 23; described with reference to unthreaded hole 22; signal unthreaded hole 23 and axle sleeve 7 threes are not on the line of the same side; this moment, light barrier 8 just in time all blocked the reference light by cover glass 2 reflection lasers 20; the flashlight that 4 refractions of reception camera lens are returned is by signal unthreaded hole 23; reach on the light-sensitive cell 13; pass through flashlight, measure gas concentrations this moment separately.
Fig. 4 is an independent principle schematic by reference light shown in Figure 1; motor 10 among the figure in the light-baffling device 21 is rotated clockwise to the extreme higher position; the light barrier 8 that fixes with motor 10 also rotates to the extreme higher position; light barrier 8 is provided with reference to unthreaded hole 22 and signal unthreaded hole 23; light barrier 8 just in time all blocked and received the flashlight that camera lens 4 refractions are returned this moment; with reference to the reference light of unthreaded hole 22 by cover glass 2 reflection lasers 20; reach on the light-sensitive cell 13; by reference light, calibrate this moment separately.

Claims (5)

1, laser back scattering dust-measuring instrument, comprise that mainly probe apparatus and metering circuit constitute, described metering circuit structure is: pre-service and power controller connect the laser instrument of probe apparatus and the light-sensitive cell of described probe apparatus by lead, the output terminal of pre-service and power controller links to each other with signal modulation circuit, and signal modulation circuit links to each other with terminal process equipment with signal amplification circuit, signal demodulating circuit, V/I change-over circuit successively by lead; The structure that it is characterized in that described probe apparatus is: the top at box mainframe box left side wall is provided with laser instrument; be provided with and the cover glass that vertically keeps non-parallel state on the top of box main frame right wall of box; middle part at the right wall of box mainframe box is provided with the reception lens mount; in receiving lens mount to being set with the reception camera lens; on the left wall of box mainframe box; and the position coaxial with receiving lens mount is provided with light-sensitive cell, is provided with light-baffling device between light-sensitive cell and cover glass, the reception camera lens.
2, laser back scattering dust-measuring instrument according to claim 1 is characterized in that: receive camera lens and use spacer ring and trim ring sealing and fixing in receiving lens mount, the right side that receives camera lens is provided with big protective glass.
3, laser back scattering dust-measuring instrument according to claim 1, it is characterized in that: the structure of laser instrument is: the laser cover is fixed on the top of box mainframe box left side wall together by enclosing cover, semiconductor laser tube is installed in the right side of laser cover, and the laser cover is provided with the laser goggle to the right.
4. according to any described laser back scattering dust-measuring instrument of claim 1-3, the structure that it is characterized in that light-baffling device is: the bottom that is positioned at probe apparatus is fixed with motor cabinet, be fixed with motor on the motor cabinet, be fixed with light barrier on the axle sleeve of motor, described light barrier is provided with reference to unthreaded hole and signal unthreaded hole, described with reference to unthreaded hole, signal unthreaded hole and axle sleeve three not on the line of the same side.
5. laser back scattering dust-measuring instrument according to claim 4 is characterized in that: light barrier be shaped as circle or for square or for fan-shaped or for triangle or for trapezoidal.
CNU2008200774784U 2008-06-04 2008-06-04 Laser back scattering dust measurement instrument Expired - Lifetime CN201210132Y (en)

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Application Number Priority Date Filing Date Title
CNU2008200774784U CN201210132Y (en) 2008-06-04 2008-06-04 Laser back scattering dust measurement instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2008200774784U CN201210132Y (en) 2008-06-04 2008-06-04 Laser back scattering dust measurement instrument

Publications (1)

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Country Status (1)

Country Link
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102854109A (en) * 2012-07-31 2013-01-02 安徽皖仪科技股份有限公司 Novel intelligent sensor for measuring dust concentration by using laser backscattering method
CN101893568B (en) * 2009-05-19 2013-04-24 北京京东方光电科技有限公司 Environment cleanliness monitoring equipment
CN103476537A (en) * 2011-04-12 2013-12-25 通快机床两合公司 Device for focusing a laser beam and method for monitoring a laser machining process
CN105784552A (en) * 2014-12-24 2016-07-20 周志斌 Particle concentration sensor and particle concentration detection method
CN106769731A (en) * 2016-12-30 2017-05-31 聚光科技(杭州)股份有限公司 The measuring method and device of particle concentration
CN108693079A (en) * 2018-04-16 2018-10-23 东南大学 Particle flow parameter measuring apparatus and method based on laser backscatter method
CN108760687A (en) * 2018-04-08 2018-11-06 深圳市天环通科技有限公司 Laser light scattering cooking fume instrument
CN108982311A (en) * 2018-06-26 2018-12-11 南京理工大学 A kind of light scattering method dust concentration rapid measurement device
CN109765159A (en) * 2019-03-13 2019-05-17 陈美香 A kind of dust concentration detector

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101893568B (en) * 2009-05-19 2013-04-24 北京京东方光电科技有限公司 Environment cleanliness monitoring equipment
CN103476537A (en) * 2011-04-12 2013-12-25 通快机床两合公司 Device for focusing a laser beam and method for monitoring a laser machining process
CN103476537B (en) * 2011-04-12 2016-10-26 通快机床两合公司 For making device that laser beam focuses on and for the method monitoring Laser Processing
US9511450B2 (en) 2011-04-12 2016-12-06 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Apparatus for focusing a laser beam and method for monitoring a laser processing operation
CN102854109A (en) * 2012-07-31 2013-01-02 安徽皖仪科技股份有限公司 Novel intelligent sensor for measuring dust concentration by using laser backscattering method
CN105784552A (en) * 2014-12-24 2016-07-20 周志斌 Particle concentration sensor and particle concentration detection method
CN105784552B (en) * 2014-12-24 2019-08-06 周志斌 Particle concentration detection method
CN106769731A (en) * 2016-12-30 2017-05-31 聚光科技(杭州)股份有限公司 The measuring method and device of particle concentration
CN108760687A (en) * 2018-04-08 2018-11-06 深圳市天环通科技有限公司 Laser light scattering cooking fume instrument
CN108693079A (en) * 2018-04-16 2018-10-23 东南大学 Particle flow parameter measuring apparatus and method based on laser backscatter method
CN108982311A (en) * 2018-06-26 2018-12-11 南京理工大学 A kind of light scattering method dust concentration rapid measurement device
CN109765159A (en) * 2019-03-13 2019-05-17 陈美香 A kind of dust concentration detector

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C14 Grant of patent or utility model
GR01 Patent grant
C56 Change in the name or address of the patentee

Owner name: SHANXI ZHONGLV ENVIRONMENTAL PROTECTION GROUP CO.,

Free format text: FORMER NAME: TAIYUAN ZHONGLV ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD.

CP01 Change in the name or title of a patent holder

Address after: 030032 Shanxi environmental protection science and Technology Park, central street, hi tech Zone, Shanxi, Taiyuan

Patentee after: Shanxi green environmental protection Group Co Ltd

Address before: 030032 Shanxi environmental protection science and Technology Park, central street, hi tech Zone, Shanxi, Taiyuan

Patentee before: Taiyuan Zhonglv Environmental Protection Technology Co., Ltd.

ASS Succession or assignment of patent right

Owner name: ZHONGLV ENVIRONMENTAL PROTECTION TECHNOLOGY CO., L

Free format text: FORMER OWNER: SHANXI ZHONGLV ENVIRONMENTAL PROTECTION GROUP CO., LTD.

Effective date: 20120524

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20120524

Address after: 030032 Shanxi environmental protection science and Technology Park, south of North Central Street, Taiyuan hi tech Zone, Shanxi

Patentee after: Sinogreen Environmental Protection Science & Technology Co., Ltd.

Address before: 030032 Shanxi environmental protection science and Technology Park, central street, hi tech Zone, Shanxi, Taiyuan

Patentee before: Shanxi green environmental protection Group Co Ltd

CX01 Expiry of patent term

Granted publication date: 20090318

CX01 Expiry of patent term